PRONAR ZEFIR 85, Servicing Instruction

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PRONAR
E. WORKING WITH THE TRACTOR
PRONAR
38
ZEFIR tractor operation with machine (tool) at copying regulation.
Such type of operation requires:
1
•
positioning levers 1 (Fig. E-17) controlling outputs of
external hydraulic system in „neutral” position if
machines (tools) co-working with external hydraulic
system of the tractor are not in use;
•
positioning lever 1 (Fig. E-16) of positional
regulation of steering with lifting appliance in
appropriate range;
•
adjusting the copying wheel position of the machine
(tool).
Fig. E-17 Levers steering with outputs of external hydraulic system.
ZEFIR tractor operation with machine (tool) at automatic-type positional regulation.
Lever 1 is designed for positional regulation (Fig. E-16) . At positional regulation, the force regulation
lever 2 ought to be positioned in „ OFF ” position on pictogram and in this situation is not in use.
With use of lever of positional regulation 1 we set the desired height of the machine (tool) above ground
or operation depth.
ZEFIR tractor operation with machine (tool) at automatic-type force regulation.
Automatic-type force regulation is most proper for machines, that need to be dig deep into soil (eg.
plough, cultivator).
When working with machine, that needs to be dig deep into soil, first lower the tool with use of positional
regulation lever 1 by moving the lever forward (Fig.E-37) , and then whie the tractor is running, by force
regulation lever 2 select desired operational depth. When driving out of the furrow and in order to lift or lower
the three-point hang-up system, one must use only positional regulation lever 1, leaving the force regulation
lever 2 in previously set position. Then, at subsequent digging the tool deep into soil, move the positional
regulation lever 1 forward to the utmost, and settings of force regulation remain unchanged.
ZEFIR tractor operation with machine (tool) at automatic-type mixed regulation
Mixed regulation uses advantages of force regulation (providing stable operation of the engine by loading
the tractor with stable pull force) at simultaneous limiting changes of working depth of the tool, especially in
case of heterogenous soils of unsteady resistance, thanks to positional regulation effect.
If in heterogenous soils of unsteady resistance one cannot obtain same working depth of the tool, one
must reduce its working depth by means of positional regulation lever 1 (Fig. E-16) .
Regulation of lowering speed and response time of the lifting appliance.
1
2
3
Fig. E-18 Regulatory knobs and levers of three-point hang-up system along with pictogram.
1 - knob for regulation of tool lowering speed; 2 - lever for regulation of sensitivity of lifting appliance activity
(response time); 3 - lever of quick lifting up and placing down the tool hung-up on three-point hang-up
system.
ATTENTION: Excessive speed of lowering the tool could cause an accident or could damage the tool
hung-up on three-point hang-up system.